3-Wheeled Dynamics Cart, 12 x 3.5", 2-Pack Category_Plasticware this six-metal density cube set

this six-metal density cube set of brass

Fullerene C60 kit with 60 atoms and 90 bonds for building the spherical cage structure characteristic of fullerene carbon allotropes

Designed to measure Planck's constant through the photoelectric effect

Replacement drive belt matched to the companion hand-crank Van de Graaff generator

Used to compare magnet strengths across the bar-magnet series

3-Wheeled Dynamics Cart, 12 x 3.5", 2-Pack Category_Plasticware this six-metal density cube setPair of 12 by 3. 5 inch dynamics carts in solid wood and aluminum with nylon ball bearing wheels, one fitted with an exploder piston for momentum and action reaction investigations.